Telephone switch



June 30, 1925.

1,543,914 H. w. GOFF TELEPHONE SWITCH Filed May l, 1923 Wye/van flaw/d M6 017.

Patented June 30, 1925.

UNITED STATES PATENT OFFICE.

HAROLD w. corn, or NEwYoRK, N. Y., AssIcNoR T0 WESTERN ELECTRIC COMPANY,

INCORPORATED, or NEW YORK, N. Y., A CORPORATION or NEW YORK.

TELEPHONE SWITCH.

Application filed May 1,1923. Serial No. 635,903.

To a]! whom it may concern:

Be it known that I, HAROLD W. Gorr, a citizen of the United States, residin at New York, in the county of New ork, State of New York, have invented certain new and useful Improvements in Telephone Switches, of which the following is a full, clear, concise, and exact description.

This invention relates to switching devices and more particularly to automatic telephone switches of the coordinate type.

Switches of the above mentioned type are characterized by the provision of coordinately disposed selective and operating bars havingcooperating elements adapted to effect engagement betweenassociated sets of active and passive contacts. The bars are actuated by electromagnets, there being usually amagnet for each selective bar and a magnet for each operating bar.

It is an object of this invention to improve the construction of switches of the above mentioned character so as to render the various parts readily accessible and replaceable. I

The object is obtained in accordance with the invention by providing the opposite ends of adjacent operating bars with a laterally extending member which is adapted to cooperate with the armature of the operating magnet associated therewith in causing the bar to rotate. With this arrangement, the magnets are disposed horizontally on both sides of the switch frame in such a manner that their mounting plates serve as bearings for one end of the bars controlled thereby, and for one end of an adjacent bar which is controlled by magnet on the opposite side of the switch.

The invention will be readily understood from the following detailed description and by reference to the accompanying drawing in which Fig. 1 shows a sectional plan view of a coordinate switch embodying the fea tures of this invention, Fig. 2 is a righthand side view thereof, Fig. 3 shows an operating card together with its associated active contacts in normal non-operated position.

The sets of grid conductors comprising the bare wires 1, 2, 3 and 1', 2, 3', etc., are securely fastened at their ends to fixed members (not shown) and are preferably interwoven with the insulating weft bars 5, as shown in Fig. 1.

The insulating supports 6 are disposed at right angles to the direction of the length of the grid conductors and in them are arranged the flexible \vire contact springs 7, 8, 9, and 7, 8 and 9, etc. The supports 6 may be-of any suitable length and may carry any desired number of sets of contact springs 7 ,8 and 9, etc. depending upon the switch capacity desired. The free ends of each set of contact springs extend through obliquely disposed apertures 10 in a tie member or operating card 11 which is mounted on a flexible supportingdnember 12, one end thereof being held securely in the supporting member 6 by means of reenforcing strip 14' and eyelets "13. i The springs 12 are adjusted normally to hold the contact springs down out of engagement with the grid conductors. The operating cards 11 are slidably arranged in suitable guides formed by a plurality of elongated T-shaped members 15 screwed on the plate 16.

An operating bar 17 is provided for each set of grid-conductors 1, 2 and 3, etc, and is provided with means for serving a plurality of active contact sets such as 7 8 and 9. For each set of active contacts 7, 8 and 9, there is pivotally mounted on the operating bar 17, a lifting finger 18, which is held in its normal position by means of a restoring spring 19. Coordinately disposed to the operating bar 17 are a plurality of selective bars 20, one for each vertical row of active contact sets. Each selective bar is provided with a camming member 21 for each set of active contacts served thereby which cooperates with a corresponding lifting finger 1,8 in effecting the operation of a preselected set of active contacts 7, 8 and 9. 7 An electromagnet 22 is provided for each selective bar 20. The energization of the magnet effects the attraction of its armature 23 which cooperates with a rigid projection 24 on the bar 20 in causing the rotation of the bar.

A mounting plate 25 rigidly secured to the frame members 26 and 27 by means of screws 29 is provided for each horizontal bar magnet 28. The plate 25 is provided with bent over projections 29 and 30 which cooperate in positioning the armature 31 which is securely supported on an elongated L-shaped operating member 32. The member 32 with the attached armature 31 is slipped in between the projections 30 and 29 and a retaining piece 33 secured on the projection 29 by means of screws 50 and 51 is provided to hold the armature in position.

On each plate 25, there is provided the laterally extending lugs ll and t2 in which the ends of two adjacent horizontal operating bars 17 are journalled.

On one end of each bar 17, ther is provided a lateral extending arm 43 disposed across the arm 32 of its associated magnet armature whereby any movement imparted to the arm 32 by the energization of its operating magnet will be imparted to the arm -l3 for rotating the bar and thereby operating any set of active contacts that might have been preselected by one of the. selecting bars 20. An arm 52 laterally extending from the plate 25 is provided for adjusting the stroke of the arn'iature 31 and to support the operating member 32 carried thereby, together with the arm 43 in normal nonoperated position against the tension of a retracting spring 4% which is hooked on the free end portion of arm 43 and the arm l5 which may be bent in order to adjust the tension of the. retracting spring.

This invention is an improvement o1 the type of switch disclosed in Patent No. 1,515,735 granted to Charles L. Goodrum, et al., on November 18, 1924.

Vhat is claimed is 2 1. In a telephone switch structure. the combination of disengaged contacts, an operating member therefor, a plurality of plates arranged to loosely support said member, an arm fixedly arranged on said member, an armature supporting member loosely supported on one of said plates and lying in a ,plane substantially parallel to the length of said arm and arranged to engage said arm, and a magnet armature fixedly arranged on said supporting member for operating said operating member to cause interengagement of said contacts.

2. In a telephone switch structure, the combination of rows of disengaged contacts, an operating bar for each of said rows, a pair of supporting plates common to a plurality of said bars, a magnet armature on each of said plates, operating arms arranged on said bars and loosely connected with their respective armatures for rotating said bars independently.

3. In a telephone switch structure, the combination of disengaged contacts, a movable bar therefor, a supporting plate for said bar, an arm, a magnet armature loosely coupled with said arm for rotating said bar, means integrally vtormed with said plate for supporting said armature in a plane parallel to the longitudinal axis of said arm. an electromagnet arranged on said plate for actuating said armature, and means attached to said arm for returning its operating armature to normal nonoperated position: after each energization of said clectromagnet.

t In a switching device, the combination of normally disengaged stationary and operable contacts, a rotatable bar for operating said last mentioned contacts, a magnet tor rotating said bar, a supporting plate for supporting said magnet and said bar, an armature supporting arm for said magnet pivotally arranged on said plate and extending over the longitudinal axis of said magnet, a laterally extending arm rigidly arranged on said bar having its free end portion bent substantially at right angles and lying in operative relation with said armature supporting arm for etlecting the interengagement of said operable and stationary contact.

5. In a coordinate switch structure, the combination of a plurality of sets of disengaged active and passive contacts ar ranged in parallel rows, a movable bar for each of said rows, supporting plates therefor, an armature arranged on each of said plates and each having its fulcrum substantially in a plane common to the longitudinal axis of its associated bar, an arm carried by said bar disposed in operative relation with said armature, and magnetic means for operating said armature to cause the intcrengagement of said active and passive contacts.

In witness whereof, I hereunto subscribe my name this 28th day of April A. 1)., 1923.

HAROLD W. GOFF. 

